DENTAL AMALGAM MERCURY SOLUTIONS www.flcv.com/dams.html
DAMS
THE ENVIRONMENTAL EFFECTS
OF AMALGAM FILLINGS AFFECT EVERYONE
THE FOLLOWING FINDINGS ARE DOCUMENTED
IN THIS Review Paper:
1. Human
excretion into sewers by those with amalgam dental fillings along with
dental office amalgam waste have been
documented to be the largest source of mercury into sewers and septic
tanks.
2. All sewer plants in the
3. Dental amalgam fillings are a major source of
mercury going into rivers, lakes, and
bays, both from dental offices and human wastes in home and office sewers.
Dentistry is the third largest use of mercury in the U.S. using 45 tons
per year most of which ends up in the environment.
4. Mercury pollution is
widespread in
5. Mercury is the most toxic
substance commonly encountered, and is adversely affecting
the health of millions of people in the
6. If sewer sludge is
incinerated, most of the mercury goes into emissions.
7. Crops grown on land
using sewer sludge pick up high levels of mercury. Soil bacteria in landfills and land spread
sludge areas methylate mercury to methyl mercury,
which is released in methane and landfill gas in high levels.
High levels of mercury are being found in rain all over the U.S.
8. Dental Amalgam
fillings are the largest source
of mercury in most people and
levels of mercury exposure from amalgam commonly exceeds Government Health Guidelines, with high levels in
human excretion wastes documented.
9. The level of mercury
in all sewer plants in the
10. Crematoria emissions
commonly violate mercury air emission standards and are a significant source of
mercury emissions due to mercury in amalgam fillings. Amalgam related air emissions exceed coal
plant emissions in UK.
11. Due to the high
mercury releases from dental offices, most European countries require amalgam
separators in dental offices but the
Documentation:
Mercury is one of the most toxic
substances commonly encountered, and according to Government agencies causes
adverse health effects in large numbers of people in the
Mercury has been found to be so toxic
that the drinking water standard for mercury is 2 parts per billion(ppb). But U.S. EPA have found that because mercury bioaccumulates in the environment and fish, in order to
protect from accumulation in fish and wildlife and human health even lower
standards appear to be needed and lower standards have been proposed or adopted
in many areas(14). The Great Lakes
Initiative Wildlife Criteria calculated needed to prevent accumulation in fish
and wildlife is 1.3 nanagrams per Liter(ng/L) while the GLI Human Health Criteria is 3.1 ng/L(parts per trillion). The EPA Fish Tissue Methyl
Mercury-based Criteria for rivers is 7.8 ng/L
and for lakes is 3.5 ng/L. The California Toxics Rule
Saltwater Criteria is 25 ng/L(14). The EEU limit on mercury in sewers is 50
micrograms per liter(31).
The average amalgam filling has more than
˝ gram of mercury, and has been documented to continuously leak mercury into
the body of those with amalgam fillings due to the low mercury vapor pressure
and galvanic current induced by mixed metals in the mouth(20). Amalgam has been well documented to be the
number one source of mercury in most people(19,20) and
to commonly cause serious adverse health effects(20). Amalgam has also been documented to be the
largest source of methyl mercury in most people, since mercury vapor and
inorganic mercury have been shown to be methylated
to methyl mercury in the mouth and intestines by bacteria, yeasts and other
methyl donors(20). Mercury has also been
found to be methylated in dental office disposal and
sewer systems at levels orders of magnitude higher than in lakes and rain(4d).
Because of the extreme toxicity of mercury,
only ˝ gram is required to contaminate the ecosystem and fish of a 10 acre lake
to the extent that a health warning would be issued by the government to not
eat the fish[2].
Over half the rivers and lakes along with most bays in
Nationwide the dental industry is the third
largest user of mercury, using over 45 tons of mercury per year(26,14),
and most of this mercury eventually ends up in the environment. Amalgam from dental offices is by far the
largest contributor of mercury(over 35% of total) into
sewers and sewer plants(4,13b,14,26), with mercury from replaced amalgam
fillings and crown bases the largest source. When amalgam fillings are removed
by standard practice methods using primary and secondary solids collectors,
approximately 60% of the amalgam metals by weight end up in sewer effluent(28b). As much as 10% of prepared new amalgam
becomes waste. This mercury also accumulates in building sewer pipes and septic
tanks or drain fields where used, creating toxic liabilities. Unlike Canada and most European countries such as Germany, Sweden,
Switzerland, and Denmark which have much
more stringent regulation of mercury that requires amalgam separators in dental
offices(26,28,22), the U.S. does not and most dental offices do not have
them. The discharge into sewers at a
dental office per dentist using amalgam without amalgam separators is between
56 milligrams per day(14) and 270 milligrams per
day(4,14,26). (some studies found much higher levels
for some offices) For the
Studies in Michigan, California, and
Washington estimated that dental mercury is responsible for approximately 12
to14 % of mercury discharged to streams (5). An EPA study(13)
found that dental office waste were responsible for similar levels of mercury
in lakes, bays, and streams in other areas throughout the
The total discharge into sewers from
dental amalgam at individual homes and businesses
is
second only to that from dental offices(14), since the average person with amalgam fillings excretes in body waste
approximately 40 micrograms per day of
mercury(6,7,8,20,31a). This has also been confirmed by medical labs(13c), such as Doctors Data Lab in
MCES found that dental offices were
responsible for over 40% of Mineapolis sewer mercury
and excretion from those with amalgam responsible for over 80% of domestic
mercury(4). According to an EPA study
the majority of
ORNL
studies have found that crops grown on land using land spread sewer sludge pick
up high levels of mercury, and soil bacteria methylate
inorganic mercury into methyl mercury, which is released into the air or
landfill gas at high levels(22,23a). Sixty percent of
the 5.6 million tons of sewage sludge generated each year are used for land application(27). The ORNL studies estimate that emissions of
mercury from sludge amended soil amounts to from 5 to 6 tons of mercury per year(23a). Most
dental amalgam waste from dental offices either goes into landfills or is incinerated(26).
Much of the sewer sludge is also incinerated. Most of the mercury in materials that are
incinerated goes out in the emissions, as most incinerators have no controls to
remove mercury. High levels of
mercury including the very toxic organic forms are being measured in rainfall
throughout the U.S.(24). High levels of the extremely toxic dimethyl and methylmercury forms
of mercury are being found in landfill gas coming from landfills and appear to
be a significant source of some of this(22,24). Bacteria in landfills have been found to be methylating elemental and inorganic mercury to the organic forms(22a,23a).
Dental amalgam waste and mercury from human sewer sludge are major
sources of mercury in some landfills and sludge is also used in landspreading on farms and other areas. Health Canada has also documented similar
information on mercury emissions from amalgam and sewer sludge to waterways,
crops, and air(28,29).
Additionally cremation of those with amalgam
fillings adds to air emissions and deposition onto land and lakes. A study in Switzerland found that in that
small country, cremation released over 65 kilograms of mercury per year as
emissions, often exceeding site air mercury standards(9), while another Swiss
study found mercury levels during cremation of a person with amalgam fillings as
high as 200 micrograms per cubic meter(considerably higher than U.S. mercury
standards). The amount of mercury in
the mouth of a person with fillings was on average 2.5 grams, enough to
contaminate 5 ten acre lakes to the extent there would be dangerous levels in fish(2,20). A
Japanese study estimated mercury emissions from a small crematorium there as 26
grams per day(10).
A study in Sweden found significant occupational and environmental
exposures at crematoria, and since the requirement to install selenium filters
mercury emission levels in crematoria have been reduced 85%(11). For the 70% of people in Britain who
die and end up with their bodies being cremated, the mercury escapes into the atmosphere and
contaminates waterways, soil, wildlife
and food. Crematoria now contribute 16% of all the mercury released by industry
and power
plants in Britain(32), with levels projected to soon exceed emissions by
power/industrial plants(32b). The 440,000 people cremated in Britain every year
are estimated to discharge 1300kg of mercury(12) A study of assessing hair mercury in a group
of staff at some of the 238 British crematoriums found that the groups hair
mercury were significantly greater than that of controls(12). Government guidance calls on them to introduce new flue cleaning
measures to help achieve a statutory target of a 50 per cent reduction by 2012.
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*********************************
Technical contact person: Bernard Windham
President
and Research Coordinator, DAMS
International
berniew1@embarqmail.com ph: 850-878-9024